Plow-lifting device for gang-plows.



1. A. ISERGREN. GW LIFTING DEVICE FOR GANG FLOWS.

APPLICATION FILED DE'C.I5 I9I.

Patented Mur. 4, 1919.

s sIEETs-SHEETI J. A. BERGREN.

PLOW LIFHNG 11M/ICE Foa GANG PLows.

APPLICATION FlLED DEC.15, 1915.

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PLQW UFTING DEVICE FOR GANG PLOWS. APPLlcATloN' FILED DEC.15\1916,

l ,296,039, Patented Mar. 4,1919.

3 SHEETS-SHEET 3.

i `frame sectimed on the line 7-7 JOI-IN A. IBERGREN, OF LAKE PARK, MINNESOTA, ASSIGNGR OF ONE-TWEiITIETa-rf T0 AUGUST HOLMGRN, THREE-TWENTIETHS TG TO CHARLES H. KELSON, ONE-TWENTIETH TWENTIETHS T0 ALFRED F. YOUNGBER-G, ALL

JOHN I-I. MAN, THREE-TWENTZE-IS 0F LAKE BARR, MINNESOTA.

PLOW-LIFTING DEVICE FOR GANG-PLOWS.

Specifcationof Letters Patent.

l Paten ted Mar. el, Lilien Original application filed fune 2S, 1915, Serial No. 36,697. Divided andths application filet; -ieocmber i5,

1916. Serial No. 1373234.-l

To all 'wlw/m it may concern:

Be it known that I, JoHN A. Bnnennma citizen of the United States, residing at Lake Park, in the county of Becker and State of Minnesota, have invented certa-in new and useful Improvements in Plow-Lifting Devices for Gang-Flows; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as vwill enable others skilled in' the art to which it appertains tomake and use the same.

My invention relates to improvements 1n plow lifting devices for gang plows and is filed as a division of my copendin I application, entitled Gang plows, filed une 28 -1915, under Serial Number 36,697, rand allowed July 3, r1916.

To the above end, the invention consists of thenovel devicesl and combinations of devices hereinafter described and defined in the claims.

. 1n the accompanying drawings, which illustrate the invention, like characters indicate like parts throu hout thezseveral views,

Referring tothe rawings Figure .1 is a plan view of a' gang plow having the invention incorporated therein; Fig. 2 is a detail perspective view, showing one of the plow beam coupling yokes and a portion of the plow frame;

Fig. 3 is a fragmentary side elevation with some parts sectioned and with one of the plows shown in a raised position by means of broken lines;

Fig. 4 is a detail view in section taken approximately on the line 4-4 of Fig. l;

Fig. 5 isa detail view in' section taken the line 5-5 of F ig. 1, on an enlarged scale;

Fig. 6 is a rear elevation; and

Fig. 7 a detail view with the plow of Fig. 1, on an enlarged scale.

For the purpose of this divisional application, it will not be necessary to describe in detail thetruck of the gang plow and it is only necessary to note the two front wheels 1, rear wheel 2, frame 3, which, as shown, is van approximately triangular skeleton structure, and draw bar 4.

The plows 5 have the usual beams 6, to

. 14 are provided for plows, but permitting independent vertical.

the front ends ci which clevis plates 4'l' are rigidly secured. These clevis plates have vertically spaced perforations, through which coupling the same to the perforated prongs oclevis yokes or brackets 9. Said yokes 9 are adjustably connected to the obliquemember oi? the frame 3, Ipreferably with freedom for both Verticai and lateral adjustments. 'ifo this end, the' yolres Qiare provided with verti'. cally spaced slots 10 vand the oblique member of the frame 3 is provided with transversely' spaced perforations 11, through which and the slots 10, nuteequipped bolts 12 are passed.

Upright guide hars 13 arelrigidly secured tothe rear portions of the plow beams 6 of the inner and intermediate plows and guide 'arms le are rigidly 'secured to the rear portions of the intermediate and land side or outer plow, ri`hese guide bars 12J-and arms positively spacing the movements thereof. The guide arms 1d are T0 CARL T. STRAND, AND TW-- bolts 8 are passedto couple preferably made Z-shaped and are each made up of two sections having oyerllapping perforated portions adjustably anti rigidly connected by nut-equipped bolts end portions' of the guide'nrms `Mare rig idly secured touthe plow beamsof the inter-l mediate and outside plowe, while the forlwardly extended inner ends of said`guide arms work with freedom for vertical 'movement between the guide 'bars .13 of the intermediateand inside yplow beams 6.

As a means for raising andiowering the plows 5, I provide atransver'se rock shaft 16 mounted in upright bearings 1'? yripjidly secured to the frame 3. This roch shaft 1d, at its ends, has upwardly extendedbearing arms 1S and 19, and, at its intermediate portion` it is provided with 15.1y The outer' an upwardly Bil extended latch lever 20, which coperatcs with a latch arch 21 rigidly secured to one of the upright bearings 17.

he rear provided with Van upwardly projecting arm or. lug 22, having a perforation through portion of each plow beam 6 is' of the lifting' rods 23 and engage the lugs" 22 to cause saidrods to reise the plows when pulled forward. The front ends of the liftmg rods 23 are connected, one to the arm 18, another to the arln 19 andthe third or .1ntermediate to the lever 20, at a point 1n line with the pivotal connections between the outside rods 23 and the arms 18 and 19. The

lever 20 is, thereiore, made to serve as one of the crank arms for connecting the intermediate lifting rod 23 to the rock shaft 1G. Coiled springs 25 are placed around the rear portions of the lifting rods23 and are, compressed between the respective lugsl 22 and stop collars on said rod. These springs yieldingly press the plows down ward, but permit them to independently rise, in case' they strike La rock or other obstruction.

The land side lifting rod 23 is detachably connected to its crank arm .19 and 1s provided' with a forwardly projecting eye 27 to which one end of a chain 28 is secured. The other end of this chain 28 is attached to and adapted to be wound upon a windlass drum 29, the shaftfof which is journaled in bearing lugs 30 rigidly secured to the inner face of the transverse front bar of the frame 'The windlass drinn 29 is rotated by a hand lever 31 connected thereto'by a' pawl 32 and a ratchet wheel 33. This level' 31 is fulcrumed on `the shaft of the wmdlass y drum 29 and carried on the pawl 32, and

the ratchet wheel 33 is rigidly secured to the y windlass drum 29. A gravity actuated pawl 34 is pivoted to one of the bearing lugs 30 and arranged for cope ation with the ratchet wheel 33, to prevent backward rotation of the windlass drum 29, and hence. the unwinding of the chain 28, under the weight )of the land sidcplow 5.

To make the lifting of the plows an easy l matter, under manipulation of the lever 20,

they are, in part, counterbalanced or lifted by a heavy coiled springt-l5. This spring 35, as shown, is anchored, at one end, to the lever 20 and, at its other end, to a projection 36 on the front'bar of the fraaie 3.

As is evident, by manipulating the lever 20, the plows may be lowered and raised to and from operative positions and may be 'aised or set into inoperative positions above the ground. When set in operative posi tions in the ground, the plows 5 are yieldingly pressed downward by the coiled springs 25, so that they may rise to clear rocks or other obstructions. The depth at which the plows will enter the ground depends upon the elevation of the front ends of the plow beams 6.'

It is sometimes desirable to use lows of different widths; for instance, reaking plows are usually narrower than other plows. For this reason, means, above de- Obviously, when the 6 is varied by adjustments of thivv clevis brackets 9 on the oblique bar of the lframe 3, the spacing of theplows 5 should be corre spondingly varied by adjustments of the two-part spacing arms 1-1. l

A small tractor, such as will preferably be used in connection with this gang plow, will be found to have sufficient power to draw three plows, under certain conditions of the soil, but may not be powerful enough to draw more than two plows, under certain other conditions ofthe soil. For this rea' son, it is advisable to provide a simple and eiiieient means for holding one of the plows out of action, when desired. The above described lever actuated windlass drum 291m the frame 3, with its chain connection 28 to the eye 27 on the respective lifting rod 23, affords very simple means for accomplishing this result.

Obviously, by detaching the land side lifting rod 23 from the crank arm 19 andoperating the lever 31 with a ratchet-like action, the land side plow may be raised and held in its inoperative position, while the other two plows may be manipulated, just as if all of the plows were operative. It is also evident that the said plow may be lowered by reversing the action `of thelever 31. Here, it will be noted that the vertical space between the spacing bars 13 of the intermediate plow is extended in a vertical direction, far enough to permit the above noted independent movements of the plows.

lVhen two plows, instead of three, are employed, the draw bar 4 should be adjustedv laterally, so as to properly set theline of draft. Also, different spacing of the plows may require lateral adjustments of said draw bar, in order to maintain the proper line of draft.

lt will, of course, be understood that the novel features, above described, may be ap- "device, and a plow supporting device operative on said detachable plow lifting connection before 1t is detached, but while the. plows are raised, and, when operative, serving to hold the detached plow lifting connection in position to support its coperating plow in a raised inoperative position.

2. In a gang plow, the combination with a frame, of a plurality of plows having beams pivotally attached to said frame, lever actuated plow lifting devices comprising a rock shaft having radial projections and lifting rods independently connecting the projections thereof to the ,rear portions of the several plow beams, the lifting rod of the land side plow beam being detachable from said rock shaft, and a. plow lifting and supporting device, engageable with the lifting rod of the land side plow, to hold the land side plow in a raised inoperative position.

3. In a gang plow, the combination with a frame, of a plurality of plows having beams pivotally att-ached to the said frame, lever actuated plow lifting devices compris ing a rock shaft having radial projections and lifting rods independently connecting the projections thereof to the rear portions of the several plow beams, the liftino' rod of the land side plow beam being detachable from said rook shaft, and a plow lifting and supporting device engageable lith the liftinfr rodof the land side plow, for holding said plow while the said rod is detached from said shaft, and serving, after the said rod fis'detached Vfrom said rock shaft, for raising the land side plow and holding the Same in a raised inoperative position.

.In testimony whereof 'I alix my signature in presence of two Witnesses.

JOHN A. BERGREN. lfVitnesses:

H. M. DAHL, C. E. Davis. 

